// 创建文件: D:\IDEAProject\ncu\housinghubfront\src\components\BackgroundDecoration.vue
<template>
  <div class="background-decoration">
    <!-- 精美的动态背景 -->
    <div class="dynamic-background">
      <div class="building building-1"></div>
      <div class="building building-2"></div>
      <div class="building building-3"></div>
      <div class="building building-4"></div>
      <div class="building building-5"></div>
      <div class="cloud cloud-1"></div>
      <div class="cloud cloud-2"></div>
      <div class="cloud cloud-3"></div>
      <div class="sun"></div>
      <div class="light-ray ray-1"></div>
      <div class="light-ray ray-2"></div>
      <div class="light-ray ray-3"></div>
    </div>

    <!-- 浮动装饰元素 -->
    <div class="floating-shape shape-1"></div>
    <div class="floating-shape shape-2"></div>
    <div class="floating-shape shape-3"></div>
    <div class="floating-shape shape-4"></div>
    <div class="floating-shape shape-5"></div>
    <div class="floating-shape shape-6"></div>
  </div>
</template>

<script setup>
// 这是一个通用的背景装饰组件，可以在任何需要背景的页面中使用
</script>

<style scoped>
.background-decoration {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

/* 精美的动态背景 */
.dynamic-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, #1a2980, #26d0ce);
  overflow: hidden;
}

/* 建筑物 */
.building {
  position: absolute;
  bottom: 0;
  background: rgba(30, 30, 50, 0.8);
  border-radius: 5px 5px 0 0;
  box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.3);
}

.building-1 {
  left: 10%;
  width: 80px;
  height: 300px;
  animation: buildingGlow 4s infinite alternate;
}

.building-2 {
  left: 25%;
  width: 120px;
  height: 400px;
  animation: buildingGlow 5s infinite alternate-reverse;
}

.building-3 {
  left: 45%;
  width: 100px;
  height: 350px;
  animation: buildingGlow 6s infinite alternate;
}

.building-4 {
  left: 65%;
  width: 140px;
  height: 450px;
  animation: buildingGlow 4.5s infinite alternate-reverse;
}

.building-5 {
  left: 80%;
  width: 90px;
  height: 320px;
  animation: buildingGlow 5.5s infinite alternate;
}

@keyframes buildingGlow {
  0% {
    box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.3);
  }
  100% {
    box-shadow: 0 -5px 25px rgba(100, 200, 255, 0.6);
  }
}

/* 云朵 */
.cloud {
  position: absolute;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  filter: blur(2px);
}

.cloud-1 {
  top: 20%;
  left: 5%;
  width: 80px;
  height: 30px;
  animation: cloudMove 25s linear infinite;
}

.cloud-2 {
  top: 35%;
  left: 70%;
  width: 120px;
  height: 40px;
  animation: cloudMove 30s linear infinite;
}

.cloud-3 {
  top: 15%;
  left: 40%;
  width: 100px;
  height: 35px;
  animation: cloudMove 35s linear infinite;
}

@keyframes cloudMove {
  0% {
    transform: translateX(-100px);
  }
  100% {
    transform: translateX(calc(100vw + 100px));
  }
}

/* 太阳 */
.sun {
  position: absolute;
  top: 80px;
  right: 100px;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, #ffeb3b, #ffc107);
  border-radius: 50%;
  box-shadow: 0 0 40px #ff9800, 0 0 80px #ff5722;
  animation: sunPulse 3s infinite alternate;
}

@keyframes sunPulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 40px #ff9800, 0 0 80px #ff5722;
  }
  100% {
    transform: scale(1.1);
    box-shadow: 0 0 60px #ff9800, 0 0 100px #ff5722;
  }
}

/* 光线 */
.light-ray {
  position: absolute;
  top: 120px;
  right: 140px;
  width: 400px;
  height: 200px;
  background: linear-gradient(to right, transparent, rgba(255, 235, 59, 0.2), transparent);
  transform-origin: left center;
  animation: rayRotate 10s infinite linear;
}

.ray-1 {
  transform: rotate(0deg);
  animation-delay: 0s;
}

.ray-2 {
  transform: rotate(60deg);
  animation-delay: 2s;
}

.ray-3 {
  transform: rotate(120deg);
  animation-delay: 4s;
}

@keyframes rayRotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* 浮动装饰元素 */
.floating-shape {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  animation: float 15s infinite linear;
}

.shape-1 {
  width: 300px;
  height: 300px;
  top: -100px;
  left: -100px;
  animation-duration: 20s;
  background: radial-gradient(circle, rgba(74, 144, 226, 0.2) 0%, transparent 70%);
}

.shape-2 {
  width: 200px;
  height: 200px;
  bottom: -80px;
  right: -80px;
  animation-duration: 25s;
  animation-direction: reverse;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.2) 0%, transparent 70%);
}

.shape-3 {
  width: 150px;
  height: 150px;
  top: 30%;
  right: 20%;
  animation-duration: 15s;
  background: radial-gradient(circle, rgba(80, 227, 194, 0.2) 0%, transparent 70%);
}

.shape-4 {
  width: 100px;
  height: 100px;
  bottom: 20%;
  left: 20%;
  animation-duration: 18s;
  animation-direction: reverse;
  background: radial-gradient(circle, rgba(255, 209, 102, 0.2) 0%, transparent 70%);
}

.shape-5 {
  width: 250px;
  height: 250px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-duration: 22s;
  background: radial-gradient(circle, rgba(155, 89, 182, 0.2) 0%, transparent 70%);
}

.shape-6 {
  width: 180px;
  height: 180px;
  top: 70%;
  left: 10%;
  animation-duration: 28s;
  background: radial-gradient(circle, rgba(231, 76, 60, 0.2) 0%, transparent 70%);
}

@keyframes float {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  25% {
    transform: translate(20px, 20px) rotate(90deg);
  }
  50% {
    transform: translate(0, 40px) rotate(180deg);
  }
  75% {
    transform: translate(-20px, 20px) rotate(270deg);
  }
  100% {
    transform: translate(0, 0) rotate(360deg);
  }
}
</style>
